Margaret McDermott Bridge/IH-30/IH-35 

​The Horseshoe Project managed by the Texas Department of Transportation TxDOT) upgraded bridges that cross the Trinity River at IH-30 (Margaret McDermott Bridge) and I-35E as well as updated the route geometry for connecting roadways where they all converge near downtown Dallas' Central Business District. The project meets the NCTCOG 2035 Metropolitan Transportation Plan (MTP)  The Margaret McDermott Bridge is under construction but substantially complete.

American Bridge was the contractor working with TxDOT for the construction of the Margaret McDermott Bridge. This graceful bridge, designed by renowned engineer and architect Santiago Calatrava, takes commuters and visitors across the Trinity River, one of the busiest and beautiful bridge crossings in North Texas.  

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       Margaret McDermott Bridge over the Trinity River. 

                                                                     ​ Photo by Joseph Haubert, 2017 Trinity Photo Contest

The Margaret McDermott Bridge is named after the philanthropist and wife of the founder of Texas Instruments. She was the first person to make a personal contribution that ensured Dallas' ability to secure Santiago Calatrava as the designer to meld architectural beauty with functionality for bridges over the Trinity River. She was born in 1912 and lived to be 106 years old. The City of Dallas has worked with TxDOT, legislatures, the region making the funding a priority.

For the IH-30 Bridge, the signature addition that will result in the Margaret McDermott Bridge features pedestrian and bicycle access in and around downtown, the floodway and Oak Cliff.

 Rendering of Completed Margaret McDermott Bridge with two arches.


 Photograph by Marius Silaghi, 2017 Trinity Photo Contest 


 Photograph by Judy Schmidt from the Dallas Floodway

Financing for the Horseshoe Project
Construction $700 million
Design, Construction, Management & Testing $56 million
Right of Way (R.O.W) & Utilities $62 million

Texas Department of Transportation - Horseshoe Project

Steel Fabrication Info

American Bridge is the contractor for erecting the steel arches and bridges working on the Horseshoe Project. The steel is being fabricated in Tampa, Florida at Tampa Steel Erecting Company, Florida's oldest steel company.

Shop Overview (Arch Segment EA1-N foreground & jigs for Exterior Longitudinal Girder)
Arch Segment WA1-N shelled out.
Arch Segment WA1-S
Arch Segment WA3-S.
Arch Segments WA4-N and WA4-S.
Arch Segment WA4-N.
Strut splice at Arch Segment WA4-N.
Arch Segment WA4-S Illumination Housing.
Arch Segment EA4-S.
Arch Segment EA7 at bifurcation.
Laydown – Arch Segments EA8, EA7, EA6 (N&S), and EA5 (N&S).
Stairs in Arch Segment EA5-N.
Arch stairs components.
Arch longitudinal stiffener retrofit work.
Arch longitudinal stiffener retrofit work.
Arch Segment A14. Interior painted, exterior primed.
Interior of Arch Segment A14.
Superstructure Transverse Floorbeams.
Superstructure Exterior Girder.

Steel Continues to rise for Margaret McDermott Bridge

Texas Department of Transportation (TxDOT) and the City of Dallas continue to place steel for the City's second signature bridge: the Margaret McDermott Bridge. View of first segment video.

View Installation of Segments 6 & 7 Video

View the Tampa Steel Fabrication Photo Report​​​​​​​​​​​​​​​​​​​​​​​​